After having learned how to connect your esp32 chip to a wifi network, today I’m going to show you how to send and receive data. lwIP The esp-idf framework includes the lwIP library to implement the TCP/IP stack protocol. This library, originally developed by Adam Dunkels and now maintained by a community of developers with an opensource license, is very…
You’ve already learned in the previous tutorials that all the configuration of the esp-idf framework is done using a configuration menu: You can use the same menu to set options/parameters for the program you’re developing: in today’s tutorial I’m going to explain how to do it! Kconfig The framework‘s config menu is configured via some…
In this post I’m going to show you how to connect to a wifi network. The esp-idf framework includes a wifi driver that manages the wifi interface of the esp32 chip. The driver exposes API calls the programmer can use to interact with it; you’ve already used some of those APIs in my previous tutorial: ESP_ERROR_CHECK(esp_wifi_init(&wifi_config)); ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA)); ESP_ERROR_CHECK(esp_wifi_start());ESP_ERROR_CHECK(esp_wifi_init(&wifi_config)); ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));…
The main feature of the esp32 chip, as it was for its predecessor esp8266, is for sure the ability to connect to wifi networks. I’ve already blogged in a previous article about the different standards (802.11 b/g/n) and security methods (WEP, WPA-PSK…) the chip supports; today I’m going to explain how to develop a program…
http://www.thingiverse.com/thing:572250
In the previous posts I’ve described the new esp32 chip and explained how to setup the development environment, including the use of one – optional – graphical IDE, Eclipse. Before starting to develop your programs, you need to understand three key components of the framework: flash, bootloader and FreeRTOS operating system. But don’t worry! At…
In the previous blog post, I explained how to install the official development framework (Espressif IoT Development Framework) and how to use it to compile your first example, Hello world. Even if you can write your programs with a simple text editor (on Windows I always suggest to use the opensource Notepad++), it’s very easier to…
After having introduced, in the previous post, the ESP32 chip and the official development board by Espressif, today I’m going to show you how to install and use the official development environment. The official development framework for the ESP32 chip is published by Expressif on Github, with an opensource license (Apache 2.0) and named Espressif IoT Development Framework (shortly idf). To be…
You probably already know the esp8266wifi chip, made by Espressif. It appeared on some Chinese webstores in the middle of 2014 and in the beginning it was used as a “bridge” to connect microcontrollers (Arduino…) to wifi networks thanks to its very low cost (about 5$ for a module). Because of the original firmware was not well documented, it has…
A couple of days ago, Arduino announced the global availability (before you hade to be invited) of Arduino Web Editor, the web-based development environment for Arduino boards. Arduino Web Editor is a component of Arduino Create, the web platform which allows makers to develop and share their projects, collaborating with the other users. The most important news is…